phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 2

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('c6ad01cc5a29d688fd79f0f9a8b978d3', -1, 1737581478, 1737581478, '0d3b20d7', -9, 0, 0)

Line : 187
File : sessions.php